4139958817 has 2 divisors, whose sum is σ = 4139958818. Its totient is φ = 4139958816.

The previous prime is 4139958769. The next prime is 4139958917. The reversal of 4139958817 is 7188599314.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3261666321 + 878292496 = 57111^2 + 29636^2 .

It is a cyclic number.

It is not a de Polignac number, because 4139958817 - 2¹⁹ = 4139434529 is a prime.

It is not a weakly prime, because it can be changed into another prime (4139958517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069979408 + 2069979409.

It is an arithmetic number, because the mean of its divisors is an integer number (2069979409).

Almost surely, 2^4139958817 is an apocalyptic number.

It is an amenable number.

4139958817 is a deficient number, since it is larger than the sum of its proper divisors (1).

4139958817 is an equidigital number, since it uses as much as digits as its factorization.

4139958817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 55.

The square root of 4139958817 is about 64342.5117399065. The cubic root of 4139958817 is about 1605.7034493057.

The spelling of 4139958817 in words is "four billion, one hundred thirty-nine million, nine hundred fifty-eight thousand, eight hundred seventeen".